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Method for preparing composite of pillared phyllosilicate and MFI type molecular sieve

A layered silicate, composite material technology, applied in molecular sieves and alkali exchange compounds, chemical instruments and methods, silicon compounds, etc., can solve the lack of microporous system, the single pore size of layered silicate, and limit the application in the field of catalysis and other problems to achieve the effect of good application prospects

Active Publication Date: 2016-02-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the layered silicate in the prior art has a single pore size and lacks an ordered microporous system, thus limiting its application in the field of catalysis

Method used

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  • Method for preparing composite of pillared phyllosilicate and MFI type molecular sieve
  • Method for preparing composite of pillared phyllosilicate and MFI type molecular sieve
  • Method for preparing composite of pillared phyllosilicate and MFI type molecular sieve

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Put 532ml deionized water, 9.1gNaF, 10.7gH 3 BO 3 , 8.66g of NaOH, 141ml of PEG300 (polyethylene glycol with an average molecular weight of about 300) solution is uniformly mixed, and 250ml of 40% silica sol solution is slowly added under vigorous stirring, transferred to a closed reactor, and reacted at 160°C for 70 hours. After the completion of the reaction, it was separated, washed with deionized water, and dried, and was identified as Kenyaite layered silicate by XRD. The product was named Ken-1.

Embodiment 2

[0027] Mix 15g Ken-1, 24g cetyltrimethylammonium bromide, 300g deionized water, stir for 2 hours, add 15g 25% tetrapropylammonium hydroxide solution, the weight ratio of the resulting mixture is: layered silicate : Cetyltrimethylammonium bromide: tetrapropylammonium hydroxide: water = 10:16:2.5:207.5. The mixture was reacted at 80°C for 24 hours. After the reaction, the product was separated, washed, and dried, and the product was named Ken-swell.

[0028] See Ken-swell’s XRD pattern figure 1 ,by figure 1 It can be seen that after puffing, the layer spacing of Kenyaite layered silicate increases to about

Embodiment 3

[0030] Mix 15g Ken-1, 75g cetyltrimethylammonium bromide, 465g deionized water, stir for 2 hours, add 60g 25% tetrapropylammonium hydroxide solution, the weight ratio of the resulting mixture is: Kenyaite layered silicic acid Salt: Cetyltrimethylammonium Bromide: Tetrapropylammonium Hydroxide: Water=10:50:10:340. The mixture was reacted at room temperature for 72 hours, and after the completion of the reaction, it was separated, washed, and dried, and the product was named Ken-swell-2.

[0031] Ken-swell-2 was identified by XRD to have a Kenyaite layered structure, and the layer spacing increased to about

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Abstract

The invention relates to a composite of pillared phyllosilicate and an MFI type molecular sieve and a preparation method of the composite, and mainly solves the problem that in the prior art, the application of phyllosilicate in the catalytic field is limited as the phyllosilicate has a single pore diameter and lacks an ordered microporous system. The composite has two symbiotic phases, and is characterized in that an XRD diffraction spectrogram has a maximum spacing value d at the angstroms of 38.37+ / -4.8, 11.12+ / -0.67, 9.95+ / -0.45, 3.86+ / -0.07, 3.83+ / -0.06, 3.75+ / -0.06, 3.72+ / -0.06, 3.64+ / -0.06 and 3.42+ / -0.05. The composite has a relatively good application prospect in the aspects of catalytic cracking and heavy oil cracking reaction.

Description

Technical field [0001] The invention relates to a method for preparing a composite material of pillared layered silicate and MFI molecular sieve. Background technique [0002] Kenyaite is a layered silicate material, which can be obtained from natural minerals or artificially synthesized. Its chemical formula is Na 2 O·22SiO 2 ·10H 2 O, where Na can also be replaced by other alkali metal elements, such as K, Rb, and Cs. Si can also be partially replaced by other elements, generally trivalent elements, including B, Al, Fe, and Ga. The layer spacing of Kenyaite layered silicate is On the left and right, due to the large interlayer spacing, larger molecules can be allowed to enter and exit freely between the layers, which has broad application prospects in adsorption, catalysis, and preparation of inorganic-polymer symbiotics. [0003] The layers of Kenyaite are stacked disorderly, which makes most of its layer surface inaccessible to reactant molecules. At the same time, the therm...

Claims

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Application Information

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IPC IPC(8): C01B33/44C01B39/46
Inventor 陶伟川袁志庆
Owner CHINA PETROLEUM & CHEM CORP
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